That's you assuming they show you what YOU want and not what THEY want you to see.

My gboard has gotten way worse. I also have 2 languages turned on but I have multilingual suggestions turned off and it still tries to suggest words in the wrong language half the time

You need to very consistently mark every short video as Not Interested and then avoid watching them like the plague. It worked for me but took about a week of doing it.

What’s even more annoying is they’re capable of recommending interesting long videos, they purposefully recommend shorter videos on mobile (like less than a minute), on pc they recommend more long videos and the TV app seems to have the most long videos